Buoyant oral therapeutic dosage forms include at least one structural element with hollow cavities. Specifically the structural element may be a foamed or microporous polymer matrix, e.g. of polyolefin, polyamide, polyester, polystyrene, polyacrylate, PTFE, PVC, polyvinylidene chloride or polysiloxane, e.g in the form of a foldable or rollable film or a tablet core or layer. Alternatively, the str...

A method for preparing an oxidation catalyst comprises (a) mixing a deactivated phosphorous-molybdenum-alkali metal catalyst with a liq. compsn. consisting of water, ammonium ion and nitrate ion, (b) removing the liq. compsn. by drying, and (c) calcining the obtd. dried catalyst. The oxidn. catalyst is used in the production of unsatd. carboxylic acids by the vapour-phase catalytic oxidn. of unsa...

A structure supporting a mirror comprises two frames which are mobile in elevation and azimuth. Motors drive the respective frames to orientate the mirror. The azimuth frame supports a gyroscopic wheel which has two degrees of freedom ensured by a universal joint comprising two crossed frames. Detectors sense the axis w.r.t. the azimuth frame and precession motors apply procession torque to the...

In an electrode assembly for gas-forming electrolyzers, particularly for monopolar membrane electrolyzers comprising vertical plate electrodes and opposite electrodes and a membrane between the plate electrode and the opposite electrode, the distribution of current in the membrane is improved and the voltage drop is decreased in that the plate electrodes are provided on that surface which faces th...

When used as occlusion agents or to cause fractures in a petroleum reservoir, polymer gels crosslinked with polyvalent metal ions can be removed by the use of special complexing agents.

Highly pure tetrachloro-1,4-benzoquinone is prepared by the action of chlorine and hydrochloric acid on hydroquinone, characterised in that the 1.9- to 2.1-fold molar amount of gaseous chlorine is allowed to act, at temperatures from 5 to 15 DEG C, on 1 mole of hydroquinone in the 6- to 7-fold molar amount of 30% to 37% hydrochloric acid, the suspension obtained, which essentially contains the 2,5...

A composite porous material comprises a particulate inorganic porous material and a crosslinked organic resin having a microvoid in the pores of the inorganic porous material. The composite porous material has a surface area larger than that of inorganic porous material. The inorganic material is pref. a porous silica particle. The organic resin is pref. an ion-exchange resin or a chelate resin....

The invention relates to gas- or liquid-containing microparticles based on amyloses, process for producing them and their use as diagnostic agents.

The invention relates to gas- or liquid-containing microparticles based on amyloses, process for producing them and their use as diagnostic agents.

A process for regenerating a particulate catalyst by (a) passing the used catalyst into a regeneration zone, (b) contacting the catalyst with an oxygen-contg. gas stream in a combustion zone, (c) passing a low carbon catalyst downward through a temp. adjustment zone, (d) passing the catalyst downward through a drying zone, (e) compressing at least a major portion of the combustion gas stream to pr...

The air circuit interrupter comprises a cam driven to be rotated by the handle operation of the circuit interrupter and a charge lever in rolling contact with the cam for rotation. An energy storing spring is chargeable by the charge lever and a link mechanism transmits the stored spring force in the spring to the side of a contact operating mechanism. A contact-opening-waiting mechanism prevent...

A primary cell has a container comprising a metal can (18) closed by a plastics disc (16) through which a current collector (17) extends. If the pressure inside the container rises to an excessive value, the plastics disc is deformed and the electrical circuit through the cell is opened.

A sepn. device for treatment of a fluid stream has fixed inlet and outlet nipples for supply and removal of fluid streams. The nipples are interconnected by a rotating member which is divided internally into several working sections. A separation device comprises a feed box, an upper timing crown, an upper distribution crown, a distribution box and a separator body contg. working compartments. Co...

The balancer for reducing the vibration of a solar collector comprises a foundation (20), a first rotatable shaft (21) mounted on the foundation, a first motor (22) driving the first shaft, to which a cylindrical body (23) is perpendicular, a movable mount (25) supporting a second rotatable shaft (24) driven by a second motor (26), a third rotatable shaft (27), through the second rotatable shaft a...

The invention provides for the generation of electrical power from low head water, such as the flowing water of rivers or the like, the electrical power is generated by passing the water in sequence over flexible bags or membranes to displace air under the flexible bags or membranes. The displacement of the air is utilized for the driving of a power generator such as an air turbine, and smooth pow...

A solar ray-collecting device comprises a Fresnel lens 2, an optical coupling 20 made of a tip-cut conical light guide, and an optical cable 5. The solar rays focused by the lens 2 are received at the large end 20a of the optical coupling and discharged from the small end 20b thereof and guided into the cable 5. The light-emitting end 20b of the optical coupling is adhesively joined to the light-r...

A solar ray-collecting device comprises a Fresnel lens 2, an optical coupling 20 made of a tip-cut conical light guide, and an optical cable 5. The solar rays focused by the lens 2 are received at the large end 20a of the optical coupling and discharged from the small end 20b thereof and guided into the cable 5. The light-emitting end 20b of the optical coupling is adhesively joined to the light-r...

The method comprises (i) calcining Jarosite at 200-600 deg.C to leach in water, (ii) neutralizing the leached solution with alk. aq. soln. for pptg. and washing the pptn, (iii) mixing pptn. with active material/additive i.e. active carbon, phosphates, gypsum, clay, zeolite, and (iv) molding and drying to have more than 20% of porosity rate.

A process for removing an acidic gas component from a waste gas comprises (a) washing the acidic gas component with an aq. alkali soln. of pH 6-13, and (b) absorbing the acidic gas component with an aq. alkali, soln. of 0.3-2.5N. The alkali soln. is pref. sodium hydroxide.

The present invention relates to a measuring instrument 1 for measuring depth and angle on external or internal bevelling 2 on a measurement object 3, the measuring instrument having a body 4 and a measuring blade 5 arranged displaceably thereon, and a measurement scale and a marking interacting therewith being arranged so as to measure the displacement of the measuring blade in relation to the bo...